Raking attachment



July I0, 1928.

' L@ H; LARSEN RAKING ATTACHMENT 3' Sheets-Sheet 1 Filed 00'( v18, 1926 nwntoz: Louis ans'ezo.

July l0, 1928. 1,676,830

L. H; LARsEN RAKING ATTACHMENT Filed oct.18, 192e sheetsfsneet 2 s m f l f dg 5 Q h3 A n) v U n N w nwmtoc.- ZOuLSJZZaPSeZ/a.

reduced portions14a apertured to receive a transverse rod 16 abutting the inner periphery of the tubular memberf 8, thus firmly` anchoring said teeth in position.r The use ofu a rod 16 permits thez'removal'and vreplacement of an individual tooth'by the simple expedient of withdrawing the samewlongi-z tudinally of the tubular member. i v

As shown in Fig. 2 ofthe drawings, .the teeth 14 are adapted to fit within the intersticesrof a grate and project a slight distance "above the ,upper face thereof, and while in this position it is my intention to reciprocate said teeth in adirection corresponding f ai" that saidrecess'lQ-'and said clamps 20 loosely f to theglength of saidfinterstices.

it is my object to rocklor oscillatesaid teeth .141toa point below the lower surface of the erably two, and similar inconstruction, each being lconstructed rfrom Ytwo pieces of vflat materialk presenting a-portion 18 havinga u substantially semicircular-recess to vrotatably Vengage'vthe. tubular member 8 ofthe teethcarrying. means 7,; as indicated at 19 Fig.Y

4. f Said portion Y 18 is also'provided with lateral flanges 19L to which isbolted clampsA 20, as shown at21.l "Itshould be yunderstood 'i .engage theQtubularmember 8'to permitthe posit-e in nature and comprises a longitudi-- vrotation thereof therebetween, and `in order to effectthey engagement'of said; clamps 20 with said tubular member I have slotted the plate '9 and its legs-11y .and 12,v as indicated Vat 22, so that'substantially said plate 9 is arranged i three parts,as clearly-shown in The means for rocking ysaid teeth'is comnal shaft 23, housed .in a length of tubing 24,

the inner end of the latterbeing. secured-to abracket 25, which'isfU- shaped ,in plan and `presenting lateral flanges 2 6 and27, having their ends-bent at right ,angles and suitably apertured for securingvrto the portions 18 of said brackets 17. Figures 3 and 4 shouldbe consultedr to understand this construction, the rightV anglebends 28 and 29 of Fig.V 3 being shown in dot-ted lines, while in Fig. 4, the section line 4-4 of Fig. 3 cutsthe lateral flange 26 and shows the right angle bend28 secured to the portion 18 of bracket 17. Like unto the portion '18, said right angle `bends 28 and 29 are each provided with semicircular recesses 30 to t around the, lower portion of the tubular member 8. y A, y

Saidl bracket-25 is `Vapertured to receive said tubing 241 which latter, is` preferably screw-threaded to receive the clamping nuts i 31 and 32, while the shaft'23 emerges from Ythe end of said tubing 24 for pivotalk lconnection with a rock arm 33 having one end hingedly connected to a pin 34,l journalled Further `shown in Fig. 1.

in ears and 36, the other end being connected to'a link 37,y fixed insaidtubular member 8.

The other end of said tubing 24 is positioned exteriorly of.. the front of the-lire chamber andfc'arries'a clamping plate 39 and, f

pivoted toV a stud 38` til) through the mediu-mof the well-known locking-mcans45 carried by. the.' lever'41, said teeth-carrying means mayv be secured 'in any position dependent on, the location of notches 46 in saidquadrant 40.,

When the teeth arefin the position shown in-Fig 5, the device may bebodily shifted beneath the grate foroperation atY several positions thereunder, and I termthismovement transverseli as .distinguished from the longitudinal reciprocatoryVV movement g resorted -to lduring the actual manipulation of the device as a rake. Y ,Returning .now to the ldescription of' the brackets .17, it will beobserved on inspec; tion of Fig. 3, that vthe portion v`18 isbent' at right` angles below the-,bottom ofgthe `tubularl member; 8 4to define spaced legs 47 and 48, each being apertured to receive a lllfl. y

pair of vparallelly disposed pins .49 and 50,

between which ismounted tubular rails 51,V

onefon eitherfside of the device,each carry- Y ing a rotatabley shaft 52 therein. y'Each of said shafts 52 carries a wheel at its eXtremities, as indicatedfat 53 which operate on l i a'track 54 supported by arms V55 depending fr-om the edges of. said grate 6. One of said shafts. 52 extends beyond the Afront of .the

Vboiler and is -here provided with a crank 56,'

for rotatinei said shaft. VIt will alsofbe noted that prefer to positively assure the parallelldisposition of said rails land their contained shafts 52, through the medium ofs'pacer members 57 and `58,' positioned ad-V jacent the ends of4 said` rails, asclearly The foregoing descriptionI covers the essential elements of my invention, so let us proceed to the manipulation of the device, keeping in mind that sameis susceptible. of a Vvaried series of operations, towiti an'operation to bring-the teeth into placement betweenfthe in't'ersticesof a grate; an opera'-l tion tol reciprocate the teeth longitudinally therebetween; a similar. operation to osy cillate the teeth from between said interstice'sk andfinally an voperation to shift the device transversely of thevgrat'e, each there- M-lO v49 and 50 as aforesaid.

of moving in their proper sequential order.

Let us assume the device is in the position shown in Fig. 2, the teeth having been os-l cillated to this position from that shown Fig. 5. The locking means in the lever 4 1 secures the teeth in this upright position andl 'inwardly toward the front of the boiler thus retracting the shaft 23 and through the medium of th-e linkage 33-7 aforesaid foscillates the teeth to the position indicated v in Fig. 5. Sufficient clearance being afforded beneath the grate, the crank 56 is turned communicating motion to the wheels 53 through the medium of shafts 52 and thus the device travels transversely on the tracks -54. By preference VI may roughen the upper surfaces of the tracksto assure positivev traction, but this isimmaterial'to the invention. The lever 41 may nowbe drawn back to elevate the teeth to workable position and the reciprocation thereof is effected as aforesaid.

' that parts mostly likely to wear are readilyV The device is indeed featured bythe fact replacedwithout tearing down the structure as a whole.

For instance, a tooth may be readily removed by retracting the rod 16y and inserting another tooth in its place. This is but Vone of the many examples of the utility of my device. ofthe teeth in vertical position is lassured since the linkage 33-37 snugly against the tubular member 8 thus acting as a'brake, and preventing the turning thereof.

Having 4thus describedv the preferred embodiment of my invention, it is of course apparent .that several modifications and changes may be resorted to without depart` ing from the spirit ofthe invention as defined inthe appended'claims.

I claim:

Positive lockingv see Fig. 2) fits l. In a. raking attachmenga rockable member presenting a flattened top portion hav-l ing 'a plurality of apertures arranged there.- in, a plurality of teeth mounted in said rocka reduced 'portion defining a shoulder to Yabut the flattened top surface of said rockable member, and a rod removably securing said teeth to said member.

2. In a raking attachment, a rockable tubular member, an inverted U-shaped memeo' Y able member, each of said teethpresenting ber carried by'said tubular member andA having a plurality of aperturesarranged inits flattened top portion, a plurality of teeth mounted in saidfU-'shaped member,each ofA said teeth presenting 1a' reduced portion insertible wit-hin said apertures and presenting a reduced portion defining a shoulder to abut the flattened top surface ofl said U',- shaped member and a rod removably se-` curing said .teeth to said member. V

In testimony whereof I afiiX'my signature.

Louis H. LARSEN. 

